function sidebarSearch(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

/*
function init() {
	document.getElementById('get_your_cle_credits').style.display="";
	document.getElementById('view_course_categories').style.display="none";
	document.getElementById('how_it_works').style.display="none";
}
window.onload = init;
function switchBox(show, hide1, hide2){
	document.getElementById(show).style.display="";
	document.getElementById(hide1).style.display="none";
	document.getElementById(hide2).style.display="none";
}
		<ul class="tabs">
			<li><a href="#" onclick="switchBox('get_your_cle_credits','view_course_categories','how_it_works');"><img src="/images/home_tab_buy_cle_courses.jpg" alt="Buy CLE Courses" title="Buy CLE Courses" /></a></li>
			<li><a href="#" onclick="switchBox('view_course_categories','get_your_cle_credits','how_it_works');"><img src="/images/home_tab_course_categories.jpg" alt="Course Categories" title="Course Categories" /></a></li>
			<li><a href="#" onclick="switchBox('how_it_works','get_your_cle_credits','view_course_categories');"><img src="/images/home_tab_how_it_works.jpg" alt="How It Works" title="How It Works" /></a></li>
		</ul>
		<div id="view_course_categories">
			<p>view_course_categories</p>
		</div>
		<div id="how_it_works">
			<p>how_it_works</p>
		</div>
*/